1.计算1/6x-4y +1/6x+4y — 3x/4y^2-9x^2
计算1/6x-4y +1/6x+4y — 3x/4y^2-9x^2
计算(4x^2-2x^3+6x)/(-2x)-(x-1)^2y^2-4/y^2-y-6)+(y+2/y-3)/(y+1/
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
1.计算1/6x-4y +1/6x+4y — 3x/4y^2-9x^2
{4/(x+y)+6/(x-y)=3 {9/(x-y)-1/(x+y)=1
计算:(2/3x√9x+6x√y/x)+(y√x/y-√1/x)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-y)
计算6x³y^6÷(1/2)y³÷(-3x²y)-(12x^4y^6-8x²y^
分解因式计算:x^2(x-y)+(y-x)=?x^3+x^2+1\4x=?(2x+y)^2-(x-2y)^2=?